I know my ground water because I have a bore, I originally wanted to use it for my breeding room because I was blessed with non-oxidizing water. But, heavy commercial market gardens, north east and south east has caused extreme high levels of nitrate in water, unbelievable high amounts, so much so my garden and lawn grow like no tomorrow. When I first moved in 7 years ago to my semi-rural 4.5 acres I was told that scene water had a lot of ground water in it. I rang up the water authorities only to find out that ground water added as a extra was very minimal. I have bought fish from people in Canningvale, Rockingham and many other places and tested the water on many occasions, tank water and tap water from previous curiosity. And turned out to be very similar to mine!.
nitrates are illegal in scheme water and i have never found any nitrate in any tap water i have tested.....
i find that high levels of nitrate in bore water to be unusual... plants suck every nitrate available to them to grow..... must be a hell of a lot of fertilizer wash off and then to seap through the ground into your bore water? hmmm dunno... quick question how deep is your bore Buccai ??? i have a family friend living in two rocks so i know how deep you have to be to get non-salty bore water.....
one other question when you tested water from canningvale and rockingham.... what exactly did you test for???
perth water is now networked and there are some serious differences in the north and south suburbs.....
reading back over this it sounds like a bit of a personal attack on you.... i assure you its not.... just wanting to further my knowledge of WA water......